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EP 4 337 370 A1

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(43) Date of publication: 20.03.2024 Bulletin 2024/12 (21) Application number: 22706969.7 (22) Date of filing: 15.02.2022

(51) International Patent Classification (IPC):  B01D 61/08(2006.01) B01D 63/04(2006.01) B01D 61/18(2006.01) B01D 65/00(2006.01) (52) Cooperative Patent Classification (CPC): B01D 63/046; B01D 61/08; B01D 61/18; B01D 65/00; B01D 2313/025; B01D 2313/06; B01D 2313/26; B01D 2321/185; Y02W 10/10; B01D 63/04; B01D 2315/06; B01D 2313/54; B01D 2321/18 (86) International application number: PCT/US2022/016405 (87) International publication number: WO 2022/240460 (17.11.2022 Gazette 2022/46)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 12.05.2021 WO PCT/CN2021/093191 (71) Applicants: DDP Specialty Electronic Materials US, LLC Wilmington, DE 19805 (US) Zhejiang Omex Environmental Engineering Co., Ltd. Huzhou, Zhejiang 31300 (CN)

(72) Inventors: JONS, Steven D. Edina, Minnesota 55439 (US) LI, Bie Huzhou City, Zhejiang, 31300 (CN) HE, Bin Huzhou City, Zhejiang, 31300 (CN) FAN, Liangzhou Huzhou City, Zhejiang, 31300 (CN) DAS, Shankhadeep Edina, Minnesota 55439 (US) CAI, Bill Qixiang Huzhou City, Zhejiang, 31300 (CN) (74) Representative: Houghton, Mark Phillip  Patent Outsourcing Limited 1 King Street Bakewell, Derbyshire DE45 1DZ Bakewell, Derbyshire DE45 1DZ (GB)